81 lines
2.8 KiB
Python
81 lines
2.8 KiB
Python
# Copyright 2014 Catalyst IT Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from keystonemiddleware import auth_token
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from oslo_config import cfg
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from oslo_log import log as logging
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import re
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from distil import exceptions
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CONF = cfg.CONF
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AUTH_GROUP_NAME = 'keystone_authtoken'
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LOG = logging.getLogger(__name__)
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class AuthTokenMiddleware(auth_token.AuthProtocol):
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"""A wrapper on Keystone auth_token middleware.
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Does not perform verification of authentication tokens
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for public routes in the API.
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"""
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def __init__(self, app, conf, public_api_routes=None):
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if public_api_routes is None:
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public_api_routes = []
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route_pattern_tpl = '%s(\.json)?$'
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try:
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self.public_api_routes = [re.compile(route_pattern_tpl % route_tpl)
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for route_tpl in public_api_routes]
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except re.error as e:
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msg = _('Cannot compile public API routes: %s') % e
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LOG.error(msg)
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raise exceptions.InvalidConfig(msg)
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super(AuthTokenMiddleware, self).__init__(app, conf)
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def __call__(self, env, start_response):
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path = env.get('PATH_INFO', "/")
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# The information whether the API call is being performed against the
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# public API is required for some other components. Saving it to the
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# WSGI environment is reasonable thereby.
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env['is_public_api'] = any(map(lambda pattern: re.match(pattern, path),
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self.public_api_routes))
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if env['is_public_api']:
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return self._app(env, start_response)
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return super(AuthTokenMiddleware, self).__call__(env, start_response)
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@classmethod
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def factory(cls, global_config, **local_conf):
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public_routes = local_conf.get('acl_public_routes', '')
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public_api_routes = [path.strip() for path in public_routes.split(',')]
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def _factory(app):
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return cls(app, global_config, public_api_routes=public_api_routes)
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return _factory
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def wrap(app, conf):
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"""Wrap wsgi application with auth validator check."""
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auth_cfg = dict(conf.get(AUTH_GROUP_NAME))
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public_api_routes = CONF.public_api_routes
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auth_protocol = AuthTokenMiddleware(app, conf=auth_cfg,
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public_api_routes=public_api_routes)
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return auth_protocol
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